Dunno if you remember this, on making NaOH from table salt. http://cator.hsc.edu/~kmd/caveman/projects/chloralkali/slideshow/index.html
You end up with hydrogen and chlorine, which I guess you could turn into hydrochloric acid, not sure quite how though (nor how to concentrate it after that). Anyone have any ideas on that? I was thinking you could use HCl instead of phosphoric to neutralize the glycerin layer, as here: http://journeytoforever.org/biodiesel_glycsep.html Separating glycerine/FFAs You'd end up with more table salt - sodium chloride instead of sodium phosphate - which you could turn into more NaOH. Does that make any sense? This might help close the loop, and phosphoric is expensive. Traditionally soapstock is acidulated with strong sulphuric acid, but since phosphoric works just as well HCl should be okay, though I'm not sure about safety considerations. I don't know if any of this works - this NaOH from salt would be wet, I don't know if drying it would leave you with a pure enough product (not carbonated?), but it's interesting. There's also this: "Thus an equimolar amount of calcium chloride may be directly added to the soapstock and prompt separation of the calcium soap by precipitation from a relatively pure saline (NaCl) solution will ensue. Calcium soaps are useful industrial ingredients, for instance as demoulding agents." More table salt. And Dubbin, quite nice. Seems to work equally well with the glyc layer, glycerine and all. Keith ------------------------ Yahoo! Groups Sponsor ---------------------~--> Home Selling? Try Us! http://us.click.yahoo.com/QrPZMC/iTmEAA/jd3IAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
